/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "dap_main.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
UART_HandleTypeDef huart;
DMA_HandleTypeDef hdma_usart_rx;
DMA_HandleTypeDef hdma_usart_tx;
/* USER CODE BEGIN PV */
uint32_t dma_rx_last_index;
uint8_t hw_fifo[16];
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
void usb_dc_low_level_init(void)
{
        /* Peripheral clock enable */
    __HAL_RCC_USB_CLK_ENABLE();
    /* USB interrupt Init */
    HAL_NVIC_SetPriority(USB_LP_CAN1_RX0_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(USB_LP_CAN1_RX0_IRQn);
}

void usb_dc_low_level_deinit(void)
{
        /* Peripheral clock disable */
    __HAL_RCC_USB_CLK_DISABLE();

    /* USB interrupt DeInit */
    HAL_NVIC_DisableIRQ(USB_LP_CAN1_RX0_IRQn);
}

void chry_dap_usb2uart_uart_config_callback(struct cdc_line_coding *line_coding)
{
#ifdef STLINK_V21
  huart.Instance = USART2;
#else
  huart.Instance = USART1;
#endif
  HAL_UART_DeInit(&huart);
  huart.Init.BaudRate = line_coding->dwDTERate;
  huart.Init.WordLength = UART_WORDLENGTH_8B;
  huart.Init.StopBits = line_coding->bCharFormat ? UART_STOPBITS_2 : UART_STOPBITS_1;
  huart.Init.Parity = line_coding->bParityType == 1 ? UART_PARITY_ODD : (line_coding->bParityType == 2 ? UART_PARITY_EVEN : UART_PARITY_NONE);
  huart.Init.Mode = UART_MODE_TX_RX;
  huart.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart.Init.OverSampling = UART_OVERSAMPLING_16;
  HAL_UART_Init(&huart);
  dma_rx_last_index = 0;
  chry_ringbuffer_reset(&g_uartrx);
  HAL_UARTEx_ReceiveToIdle_DMA(&huart, hw_fifo, sizeof(hw_fifo));
}

void chry_dap_usb2uart_uart_send_bydma(uint8_t *data, uint16_t len)
{
    HAL_UART_Transmit_DMA(&huart, data, len);
}

void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
{
    chry_ringbuffer_write(&g_uartrx, hw_fifo + dma_rx_last_index, Size - dma_rx_last_index);
    if (Size == huart->RxXferSize)
        dma_rx_last_index = 0;
    else
        dma_rx_last_index = Size;
}

void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
    chry_dap_usb2uart_uart_send_complete(huart->TxXferSize);
}

void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
{
    dma_rx_last_index = 0;
    chry_ringbuffer_reset(&g_uartrx);
    HAL_UARTEx_ReceiveToIdle_DMA(huart, huart->pRxBuffPtr, huart->RxXferSize);
}

int fputc(int ch, FILE* f)
{
    //HAL_UART_Transmit(&huart, (uint8_t *)&ch, 1, HAL_MAX_DELAY);
    return ch;
}
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  /* USER CODE BEGIN 2 */
  chry_dap_init(0, USB_BASE);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
    chry_dap_handle();
    chry_dap_usb2uart_handle();
    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
  PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLL_DIV1_5;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }
}

/**
  * Enable DMA controller clock
  */
static void MX_DMA_Init(void)
{

  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Channel6_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel4_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel4_IRQn);
  /* DMA1_Channel7_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel5_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel5_IRQn);
  /* DMA1_Channel6_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel6_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel6_IRQn);
  /* DMA1_Channel7_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel7_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel7_IRQn);

}

/**
  * @brief GPIO Initialization Function
  * @param None
  * @retval None
  */
static void MX_GPIO_Init(void)
{
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */

  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOD_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();

/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
